Door lock



June 4, 1929. E. J. JONES 1,715,926

Y DooR Loomv Filed Nov. 25,- 1927 Cil Patented June 4, 1929.

'UNITED STATES` ELZY J. JONES, OF SAN ANTONIO, TEXAS.

Doon Loox.

Application filed November 25, 1927. Serial No. 235,678.

The object of this invention is to provide a lock of simple construction which will be free of springs and the lock, therefore, Will not be rendered inoperative at any time by 'rusting and breaking of the spring. A further object of the invention is to provide av lock which will efi'ectually hold a door closed and resist efforts to open the same, except by the use of a proper key, and a still further obj ect of the invention is to provide a simple lock which may be easily operated. The invention is illustrated in the accompanying drawing and Will be hereinafter fully set forth.

In the drawing:

Figure 1 is an elevation of ymy improved lock, one side plate of the lock case being removed and the parts being shown in the locked position;

Fig. 2 is a similar view showing the parts jon position to permit retraction of the latch Fig. 3 is a vertical transverse section on the line 3 3 of Fig. 1, and

Fig. 1 is an enlarged detail horizontal section.

The lock case 1 is a single casting having an open side which is covered by a face plate 2 after the working parts of the lock have been assembled, one end of the case being provided with an opening 3 through which the latch bar 1 may be projected to engage a keeper of the usual form. The latch bar 41- is slidably mounted in the lower portion of the case and is constructed with a longitudinal slot 5 to accommodatespaced pins G formed on the wall of the lock case and disposed in a horizontal plane thereof so that by their engagement with the slot the latch bar will be held to a rectilinear path in its movements. Above the latch bar and adjacent the inner end wall of the case an angle lever 7 is pivotally mounted, as at 8, and has one arm depending from its pivot and formed with a longitudinal slot 9 at its lower extremity engaging over a pin or stud 1G on the side of the latch bar at the rear end thereof. Extending forwardly from the pivot- S is the upper arm of the angle lever which is formed near its end with a longitudinally extending slot 1'1. The lock case is provided with an opening 12 through its side wall and a lifter 13 is fulcrumed upon the escutcheon plate of the lock to have one end portion pass through said opening and engage in the slot 1l of the angle lever, it being noted, upon reference to Fig. 3, that the lifter has its inwardly extending end portion disposed normally in substantially a horizontal plane,l

while its outer portion extends dowmvardly close to the side of the lock so that it will be out of the way but may he easily grasped when it is to be actuated. lt will also be noted that the slot 11 is long enough to receive the inner ends of the lifters from both sides of the door. The outer depending portion of this lifter or handle member is enlarged and elongated relative to the upper end portion thereof so that it will normally hang close to the lock and thereby maintain its upper end in a raised position so that the latch bar will be held projected, as shown in Figs. 1 and 2. lf it be desired to open the door, the pendent end of the lifter is raised so that the lifter will `be rocked upon its fulcrum 14 and the upper inner end portion thereof will be swung downwardly thereby rocking the angle lever 7, as indicated by the dotted lines in Fig. 2, and retracting the latch bar.

Mounted in the upper portion of the lock case is a slide 15 which is supported and maintained in a horizontal position by studs or pins 16 on the case engaging in slots 17 in the slide, and in the upper edge of this slide is a notch 18 which may be engaged by a key as will presently appear. Below the slide 15,

the lock case is formed witha lug or projec-' tion 19 having a vertical shoulder 2() at or adjacent one end and a vertical shoulder 21 spaced forwardly from the shoulder 20, the ends of the lug or projection extending from the shoulders, as shown, so as to provide supporting areas 2Q, and -Fivoted upon one side of the slide 15 adjacent the lower edge thereof is a dog 24 which is unbalanced so that one end thereof-will project across the area of the notch 18, as shown clearly in Figs. 1 and 2, the dog being unbalanced so that the opposite end thereof will rest upon the lug or projection 19, and the latter' end of the dog is formed with a tooth 25 which is adapted to engage either of the shoulders 20, 21 according to the position in which the slide may be set. Rails or ledges 2G are formed on the side of the case in vertically spaced relation adjacent the end of the upper arm of the angle lever 7 in position to support a block 27 which is slidably guided and supported by the said ledges or rails and may be moved beyond the range of movement of the angle lever, as shown in Fig. 2, or proj ect-ed under the` upper end thereof, as shown in F 1. At a point between the slide and the block 27 is pivotally mounted a rocking link 28 which at its upper end has a pin and slot connection with the forward end of the slide and at its lower end has a pin and slot connection 81 with the block 27. Above the slide 15, a key slot 32 is formed through the wall of the case and on the inner side of the wall adjacent and at opposite sides of said slot are wards 33 in the opposed edges of which are formed corresponding notches 3a. A key will be provided which has its lug shapeiil to correspond to the notches of the wards 8f3 and the notches and lugs may be varied ininitely so that any lock may be operated by the particular key designed for it but cannot be operated by any other key.

As has been said, the lifter or handle 13 normally holds the latch bar 4 projected. lf it be desired to prevent retraction of the latch bar, the key is inserted and swung to the right of Figs. 1 and 2 so that it will turn downwardly through the right hand ward 33 and enter the notch 18 which at this time is at the right of the slot The edge of the key lug will strike against the upper end ofthe dog 24 and will rock the same about its pivot so that the inner lower end or tooth 25 of the same will be raised clear of the shoulder 20, 'lhe continued turning movement of the key will cause it to engage the forward wall of the notch 18 and thereby move the slide 15 from the position shown in Fig. 2 to that shown in Fig. 1, and this movement of the slide will cause the link 28 to rock and impart sliding movement in the opposite direction to the block 27 whereby the block will be projected under the upper end of the angle lever 7, as shown in Fig. 1. T he angle lever 7 will, consequently, be then held against rocking so that the latch bar l cannot be retracted until the hey is again inserted. lll/Then it is desired to open the door, the key is again inserted and is then turned to the left of Figs. 1 and 2 so that it will pass the left hand ward 33 and again enter the notch 18. At this time the tooth 25 of the dog 24 is in engagement with the shoulder 21 but the lug of the :ey will impinge against the upper end of the dog and rock the same so that the tooth will be lifted from the shoulder 21, whereupon the continued turning movement of the key will cause it to engage the inner wall of the notch 18 and return the slide to the position shown in Fig. 2. ln both movements of the slide, the key will depress the upper end of the dog 24 and will keep the same depressed until the slide has reached the limit of its movement and the key has been turned so as to clear the dog. It will be noted that in both positions of the slide a portion of its upper edge will extend across the lower end of the key slot 32 and the key, therefore, must be inserted so that its working lug will be disposed above the wards .83 and the key can be operated only by turning it in such a position that the lug` will move downwardly. 1f the key is not the proper key so that its lugs register with the notches in the wards, it will not be able to pass the wards and consequently cannot operate the lock. lt will be noted that the lock is entirely free of springs which tend to rust and break and is composed of few parts which are simple in construction and compactly arranged.

Having thus described the invention, I claim 1. A lock comprising a latch bar mounted for sliding movement iny a horizontal rectilinear path, a retracting member pivotally mounted at a pointabove the latch bar and connected to the latch bar whereby to normally hold the same projected, and a lifter fulcrumed at a point above the latch bar and having one end operatively engaged directly with the retracting member and its other end overbalanced whereby the retracting member will be normally in position to hold the latch bar projected.

2. A lock comprising a slidably mounted latch bar, a retracting member operatively engaged with the latch bar, a handle member engaged with tlie'retracting member, a slidably mounted block disposed between the latch bar and the retracting member, and key-controlled means for setting the block under the retracting member or free of the same.

3. A lock comprising a slidably mounted latch bar, a member pivotally mounted above the latch bar and operatively connected therewith to hold the latch bar normally projected, means for rocking said member whereby to retract the latch bar, a stop member slidably mounted above the latch bar in'position to engage said retracting ehiment, a key-con trolled slide mounted above the stop member, and an operative connection between the sli de and the stop member.

t. A lock comprising a slidably mounted latch bar, a gravity element engaged with the latch bar and normally holding the same projected, means for rocking said member to retract the latch bar, a stop mounted to engage the gravity member and prevent retraction of the latch bar, aslide mounted above the stop, an operative connection between the slide and the stop, a dog pivotally mounted upon the slide, stop shoulders below the slide adapted to be engaged by the dog whereby the slide may be locked at either limit of its movement, and means whereby a key may be engaged with the slide to move the same and release the dog to permit such movement.

5. A lock comprising a latch bar, a gravity member engaged with the latch bar lto hold the same normally projected, means for rocking said member to retract the latch bar, a having one end normally projecting across stop arranged to engage said gravity 1nemsaid recess, and spaced shoulders engageable ber to prevent the movement of the same, a with the opposite end of the dog whereby to 10 slide mounted above the stop and operatively hold the slide at either limit of its moveconnected therewith, the slide being provided ment,

with a key-receiving recess in its upper edge, A In testimony whereof I aliX my signature.

a dog pivotally mounted upon the slide and ELZY J. JONES. [L s] 

